i dont believe in this kind of thing, and can shamefully say i have done it (not to a child of mine though), but i agree u shouldnt do this, as the only thing worse than catching IF and that could be a BIG IF, is telling her you didnt trust her (regardless uf she us a good kid) and that you were spying on her...better to sit her down and have a chat with her about what kinda things go on when online, and like other said, be friends with her on fb and what not etc.. you will win more putting trust in her than showing her, if your spying on her, you'll never win